Grandpa passed away early, and grandma left in a hurry, leaving behind a two-bedroom public house. When he bought a house, his uncle gave a part of the money, and his name was on the real estate certificate, and his mother insisted that it should be a share of the inheritance.

To Chen Siping's surprise, his uncle learned of their situation and did not take the initiative to visit his mother, and the change of job seemed to be mentioned casually, and there was no movement for several months. He couldn't help but sigh that the world was warm and cold, even his closest relatives were no exception, husband and wife were originally birds in the same forest, and they flew separately in the end of the disaster, and husband and wife were still like this, not to mention uncles.

Autumn goes to winter, and on the national holiday of New Year's Day this year, Chen Siping unexpectedly received a call from his uncle. Ding Zhengxin told him not to renew the contract after the expiration of the end of June, so he found a position for Chen Siping and went to the Surabaya Middle School Library as a librarian.

From a temporary worker to a contract worker, although it was only a small step, it changed Chen Siping's life and allowed him to see the dawn of hope. He sincerely thanked his uncle, ashamed of his subjective speculation, Ding Zhengxin encouraged him a few words, but did not mention his mother a word.

He only has this nephew in his eyes.

His mother's illness was like an anvil tied to his feet, dragging Chen Siping step by step towards the abyss of life, and his uncle's phone call saved him. People need a little push, and in addition to his excitement, he set a small goal for himself, read the book left by his father, leave no regrets, and meet the next stage of life with a new attitude.

That's what he thinks, and that's what he does.

Resuming his previous interrupted hobby and spending lonely nights under the lamp, Chen Siping found that his father had spent a lot of time and energy studying the gender game and genetic diversity. Now that he can understand his father, he has an unsatisfactory wife, and he has an unsatisfactory son, and he has to find an explanation, an answer to the "why" in his heart. Fathers can't take everything for granted like ordinary people, and live like worker bees or worker ants.

Chen Siping quickly copied a homework book and started the next one.

"Darwin was an amazing man. The history of human science is clouded by the shadow cast by two men, coincidentally, both of whom are Englishmen – one is Isaac Newton and the other is Charles Robert Darwin. They were buried in the same place, Westminster Abbey in London.

"Darwin called the preservation of favourable individual differences and variations, and the destruction of those harmful variations, 'natural selection,' or 'survival of the fittest.' Useless and harmless mutations are not subject to the action of natural selection, and they either become wandering traits, as we have seen in some polymorphic species, or eventually become fixed traits, which are determined by the nature of the organism and external conditions. But he didn't explain the reasons for 'individual differences and variations'.

"We now know that genetic mutations, genetic recombination, and chromosomal variations are responsible for genetic diversity. Mutations, recombinations, and mutations are all accidental, so the traits of natural selection that leave the fittest are also accidental. After a long period of evolution, species eventually manifest themselves as traits that we observe, resulting from a series of non-replicable accidents.

"Farmers in the Andean village of Marukapata follow ancient wisdom and plant more than 10 varieties of potatoes in each field, so that even if one variety has a pest, others can be harvested. It is important to preserve biological diversity. In the 40s of the 19th century, the same variety of potato 'Lumber' was cultivated in Ireland, and when the blight struck, it caused a terrible famine. Fortunately, there is another wild variety, 'Chilean Crimson', which provides the gene to resist blight. If there is no 'Chilean Crimson', if the world's potatoes are left only with 'Lumber', the consequences will be unimaginable.

"The revelation of 'Lumber' is worrying, and I often wonder if the school's commitment to 'educating people' and trying to shape students into cheerful, courageous, honest, honest, and decent standards will erase 'genetic diversity' on another level. Schools are different from profit-seeking companies, and I am opposed to the elimination of those who are not so cheerful, not so brave, not so honest, not so honest, not so honest, not so decent, like the 'harmful' genes, and these more or less negatively branded 'seedlings' are precisely the indispensable of the 'human' species, and they may well become another 'Chilean crimson' to save our existence one day in the future.

"Thank God, we can't do this, people are not potatoes after all, and no matter how powerful the 'all-staff education' is, it can't go against genetic inheritance and create a group with uniform traits. However, people, we still have to be vigilant, the school should be a piece of land for itself, the land in the natural state, so that all varieties of potatoes grow according to nature, crooked melons and cracked dates are not terrible, what is terrible is that we only accept one kind of potato, only leave one kind of potato, and think that we are doing the right thing.

"It's our right and our obligation to refuse to shape and preserve diversity."

Chen Siping burst into tears, he was the individual who was "not so cheerful, not so brave, not so upright, not so honest, not so decent", his father was defending him, but this defense came too late.